Hello Will,
You'll need to use the Notes field type to view more than just a short string of text from your field. The Note field shows you the entire contents of the field in a scrollable view. You can freely switch between Note and Text field types even after you've imported your data.
I'm not sure why nothing got imported into that field though. It's possible that you don't have all your quotes in order. If you have any carriage returns and/or newlines in your description field, you'll need to make sure the field is properly quoted. The same goes for any field that has your column delimiter.
For example:
Movie Title, Description
The Terminator, "The Terminator is
a movie with Arnold
Schwarzennegar"
"Hunger Games, The", "The Hunger Games is a fantastic book and will
now be a movie coming out on March 23, 2012"
Notice how the first movie title doesn't need to be quoted, but the second title does because the comma delimiter is within the content of the field. And also notice that the description spans more than one line, so the entire description needs to be quoted.
Check your file to make sure it follows this kind of structure for every single row, including the header row that's used to match up with field names in your form.
Thanks!
Brendan